Corrugated panels for linings for vessels



Oct. 28, 1941. J. M CARTHY CORRUGATED PANELS FOR LININGS FOR VESSELSFiled June 9, 1959 Patented Oct. 28, 1941 CORRUGATED PANELS FOR LININGSFOR VESSELS 7 Jeremiah McCarthy, Bayonne, N. 3., assignor to StandardOil Develo ration of Delaware pment Company, a corpo- Application June9, 1939, Serial No. 278,247

3 Claims.

The present invention relates to an improved lining suitable for theprotection of metallic surfaces used in the processing of corrosivematerials. The invention is especially directed to the protection andconservation of the surfaces of steel vessels which contact corrosivefractions in the refining of petroleum oils. The invention moreparticularly relates to the use of especially designed corrosion-proofpanels and the method of attaching said panels to the metallic surfaceto be protected. The panels of the present invention compriserectangular or squareworrosion-proof panels having a plurality ofconcentric, circularly -curved corrugations originating at the center ofthe panel and arranged in contiguous relationtherefrom toward theperipheral edges of said panels which are attached by welding the centerpoints of said panels and the outer edges of said panels to the surfaceto be protected.

It is well known that in the processing of corrosive materials,particularly in the refining of petroleum hydrocarbons, a seriousproblem exists with respect to the corrosion of metallic vessels.

Y This problem is greatly aggravated in processes in which high sulfurpetroleum oils are processed tion chambers, primary towers of crackingequipment, as well as storage tanks, rundown tanks, and other equipmentby lining said units with corrosion-proof .materials of suitablethickness. These corrosion-proof linings have been satisfactory withrespect to their chemical stability against corrosion and for theirprotection in this respect of the metallic surface. However, thesepanels heretofore employed'had a serious physical defect as well as adefect in the manner in which they were attached to the surface to beprotected. This was especially the case in the protection of vesselssubjected to elevated temperatures and pressures or to temperaturevariations, which vessels are most susceptible to serious corrosion.Corrosion-proof panels heretofore utilized have been attached to theinner surface of the metallic tions contacted each other.

was toattach flat panels such as alloy sheets and to weld said sheets inplace at three or four inch spacing in a manner known as buttonholewelding." This type of lining has not been en- ;tirely satisfactorysince the expansion rate of the metallic vessel is different from theex- Q fpansion rate of the lining. The lining was torn away from theshell, resulting in seepage of the corrosive liquid between the shelland the lining which further increased the corrosion rate and alsorequired frequent shutdowns for the repair of the lining. Thisdifficulty was overcome to some extent by providing lining elementsprovided with an expansion fold or flexible joint, usually at the areaat which the respective sec- This type of lining section was likewisenot entirely satisfactory "at elevated temperatures and pressures. Thissince the entire expansion of the entire sheet must be taken up in theexpansion fold inter? mediate the respective sections.

-I have now discovered a lining which, when attached in accordance withmy method, will protect the metallic vessel from corrosion and willremain secured under extreme temperature changes. My invention may bereadily seen by reference to the attached drawing showing a modificationof the same. Figurel is a top view of an individual panel sectionshowing the.

method of welding said section to the metallic surface. Figure '2represents a view taken through section AA showing said section attachedto the metallic surface. Figure 3 illustrates' a top view of severalsections attached to the metallic surface and method of welding.

Referring specifically to Figure 1, the indiyidual panel comprisescorrosion-proof materials of suitable thickness. The panel is'corrugatedwith concentric circularly curved corrugations which spread outwardly incircular curves of increasing radius from the center point to they edgesof said panel. The individual panel is vessel by various means. A commonmethod welded to the metallic surface to be protected along the edges ofthepanel and plug welded in the center. Figures 2 and 3 definitelyillustrate the manner of welding the respective panels to the metallicsurface and likewise illustrate the manner in which the individualpanels. are assembled.

The panels of my invention having concentric circularly curved 1corrugations spreading outwardly from a center point to the outer edgesof said panel and the manner in which they are welded to the surface tobe protected will permit a definite breathing of the lining whentemperatures are increased or changed and thus'wlll aacascs proofmaterial. In general, it has been found that chromium-bearing steels areparticularly of surface to which they are to be attached. In

general, the panels are preferablyfrom 6 to 24 inch squares. 'It shouldbe understood that an allowance should be made for panels adapted forlining the heads of vessels which are ellipsoid in shape, conical, orotherwise curved. The

thickness of the panels may be of any desired amount and will dependupon the particular corrosion proof material used, as well as theservicein which they are to be employed. It has been found that panels fromone-thirty second to onequarter inch thick are satisfactory inmostinstances. The concentric corrugations are preferably uniformlyspaced from the center of said panel extending outwardlyto the outeredges of said panel. The size of the corrugation, as well as thedistance between the corrugations, will depend to some extent upon therange'throu'gh which the temperature will vary in the service in whichthe panels are employed. In general, the distances between therespective corrugations should vary from one-half to two inches and theradius of the corrugation should be from oneeighth to one-half inch.

The corrosion-proof panels of the present invention may compriseanysuitable corrosiondesirable as corrosion-resistant panels for hightemperature operations. Alloy steel concentrically corrugated sheetscontaining 18% chromium and 8% nickel are entirely desirable, as well asalloy steel sheets containing 11% to 13% chromium. It is also within thescope of this invention to use alloy steel sheets containing 4% to 6%chromium, as well as nonferrous alloys comprising copper, 15% zinc,various brasses. and

the like. 1

Although the invention has been described with reference to a specificembodiment thereof, it is not intended that it shall be specificallylimited thereby as it should be obvious ,that various changes andmodifications are possible within the broader concept as set forth inthe appended claims.

I claim:

1. Vessel'suitable for the processing and storage of, corrosive liquidscomprising a metal vessel having attached to the inner surface of thesamea plurality of corrosion-proof panels, said panels having edge toedge attachments with one another and with the vessel, said panels alsobeing attached-to the vessel at a central point of the panel and beingfurther characterized by having a plurality of concentric circularcorrugations extending from the central point to the outer edges of thesame.

,2. Vessel as defined by claim 1, in which said edge to edge attachmentwith respect to panels and with the vessel 'is attained by welding.

3. Vessel as defined by claim 1, in which panels are rectangular, thedimensions of which vary in'the range from 6 to 24 inches.

JEREMIAH 'MccAR'mY.

said

